Improved photovoltaic performance and robustness of all-polymer solar cells enabled by a polyfullerene guest acceptor

Fullerene acceptors typically possess excellent electron-transporting properties and can work as guest components in ternary organic solar cells to enhance the charge extraction and efficiencies. However, conventional fullerene small molecules typically suffer from undesirable segregation and dimeri...

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Veröffentlicht in:Nature communications Jg. 14; H. 1; S. 2323 - 10
Hauptverfasser: Yu, Han, Wang, Yan, Zou, Xinhui, Yin, Junli, Shi, Xiaoyu, Li, Yuhao, Zhao, Heng, Wang, Lingyuan, Ng, Ho Ming, Zou, Bosen, Lu, Xinhui, Wong, Kam Sing, Ma, Wei, Zhu, Zonglong, Yan, He, Chen, Shangshang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group UK 22.04.2023
Nature Publishing Group
Nature Portfolio
Schlagworte:
639/301/1005/1007
639/4077/4072/4062
639/4077/909/4101/4096/946
639/638/455/954
Charge efficiency
Charge transfer
Dimerization
Electron transport
Fullerenes
Humanities and Social Sciences
Morphology
multidisciplinary
Optoelectronics
Photovoltaic cells
Photovoltaics
Polymers
Recombination
Robustness
Science
Science (multidisciplinary)
Solar cells
Stability
Xylene
ISSN:2041-1723, 2041-1723
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Zusammenfassung:Fullerene acceptors typically possess excellent electron-transporting properties and can work as guest components in ternary organic solar cells to enhance the charge extraction and efficiencies. However, conventional fullerene small molecules typically suffer from undesirable segregation and dimerization, thus limiting their applications in organic solar cells. Herein we report the use of a poly(fullerene- alt -xylene) acceptor (PFBO-C12) as guest component enables a significant efficiency increase from 16.9% for binary cells to 18.0% for ternary all-polymer solar cells. Ultrafast optic and optoelectronic studies unveil that PFBO-C12 can facilitate hole transfer and suppress charge recombination. Morphological investigations show that the ternary blends maintain a favorable morphology with high crystallinity and smaller domain size. Meanwhile, the introduction of PFBO-C12 reduces voltage loss and enables all-polymer solar cells with excellent light stability and mechanical durability in flexible devices. This work demonstrates that introducing polyfullerenes as guest components is an effective approach to achieving highly efficient ternary all-polymer solar cells with good stability and mechanical robustness. Fullerene acceptors typically suffer from undesirable segregation and dimerization. Here, the authors report a poly(fullerene-alt-xylene) acceptor as guest component to facilitate charge transfer and suppress charge recombination, achieving efficiency of 18% for ternary all-polymer solar cells.
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-37738-9